Truck for railroad rolling stock



6 WITNESSES March 11 1924. 1,486,661

R. F. HALL TRUCK FOR RAILROAD ROLLING STOCK Filed Aug. 31, 1923 3 Sheets-Sheet 1 March 11 1924. 1,486,661

, R. F. HALL TRUCK FOR RAILROAD'ROLLING STOCK Filed Aug. 31, 1923 s Sheeis-Sheet 2 7o J Hi/4W E16 w W #1 640 FIG. 3

WITNESSES March 11 1924.

R. F. HALL TRUCK FOR RAILROAD ROLLING STOCK Filed Aug. 31

1923 3 Sheets-Sheet 3 15' PP 7d Patented Mar. 11, 1924.

ROBERT I. HALL, OF SCHENECTADY, NEW YORK.

TRUCK FOR RAILROAD ROLLING STOCK.

Application filed August 31, 1923.

To all whom it may concern:

Be it known that I, ROBERT F. HALL, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in lrucks for Railroad Rolling Stock, of which improvement the following is a specification.

My invention relates to trucks for railroad rolling stock, of the class or type in which lateral resistance devices are provided, and which is set forth in Letters Patent of the United States No. 1,060,222, granted and issued to W. E. \Voodard, under date of April 29, 1913, and in an application for Letters Patent of the United States, filed by me November 29, 1922, Ser. No. 603,916.

The object of my present invention is to provide, within limited space, both as to height and width, a resistance device which will permit a relatively large lateral movementof the bolster. A further object is to provide bottom rocker journals that can be more accurately machined than those of the ordinary type, and can be kept continuously in contact with their hearings in the swing frame.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a vertical transverse section through a tour wheeled locomotive truck, of the ordinary construction. illustrating an application of my invention therein; Fig. 2, a partial similar section, showing the bolster displaced from its normal central position; Fig. 3, a bottom plan view of the bolster; Fig. ha side view of a rocker member; Fi 5, an end view, of the same: Fig. 6, a view, taken similarly to Fig. 1, showing a structural modification; Fig. 7. a bottom plan view of the same: Fig. 8, a side view of a rocker member of Fig. 6; and, Fig. 9, an

'end view of the same.

My invention is herein exemplified as applied in a four wheeled locomotive truck of the swing or lateral motion type, in which, as in present practice, a frame, 1, is supported. through the intermediation of springs. 11, on the journal boxes, a, of axles, on which the truck wheels, 5, are secured. A swing frame or bolster support, 6, extends from one to the other of the side memlcrs of the truck frame, to which it is rigidly secured at its ends. The weight carried by the truckis primarily applied there- Serial No. 660,371.

to through a floating or swing bolster, 7, which is provided with a centre plate, 7, perforated for the passage of a centre piii. The bolster is supported, with the capacity of relative lateral movement, on cam rockcrs. as hereinafter described.

In the practice of my invention, referring descriptively to the specific embodiment thereof which is herein exemplified, and first to Figs. 1 to 5, inclusive, each of the ends of the bolster, 7, is supported on two rockers, indicated, as a whole, by 9 and 9, respectively, instead of on a single rocker as in prior practice. Each of the rockers comprises a cylindrical body, 9", which extends transversely to the bolster; two cam rocker arms, 9, projecting upwardly from the ends of the body, and having curved cam faces;

and two journals, 9, in line axially with the body, said journals seating in bearing recesses, 6, formed in the side flanges of the swing frame.

Two oppositely inclined bearings, 7, 7, are formed on the bottom of the bolster, 7 at each of its ends, on each side of its longitudinal central plane. Said bearings are staggered or alternated in position, relatively to the longitudinal central plane of the bolster, and their inner ends preferably overlap, as shown in Fig. 3. The bearings, 7, rest on the rockers, 9, and the bearings, 7, on the rockers, 9. The two rockers at each end of the bolster swing in opposite directions, respectively, and each rocker, in the movements of the bolster, operates in one direction only, that is to say, in the movement of the bolster, 7, from its normal central position, shown in Fig. 1, to the limit of its traverse to the right, shown in Fig. 2, the rocker, 9. at the right hand end of the bolster, and the rocker, 9, at the opposite end, both swing to the right, and through their action on the bolster bearings which rest upon them. move the bolster to the right against the resistance of the weight which is imposed upon it. The other two rockers, 9 and 9, remain stationary. In the movement of the bolster to the left, the left hand rocker. 9. and the right hand rocker, 9, swing to the left, and the other two rockers remain stationary in their positions shown in Fig. 1. The movement of the rockers, in each direction, is confined to the proper limit by stops, 6*, on the bolster support. 6

By reason of the staggered, alternated, or

discontinuous relation of the bolster bearings, the overlapping of their inner ends. and the unidirectional operative movei'nentf the rockers, an economization of space, in the direction of the width of the truck, is effected. Should conditions make it desirable, the inner ends of the bearings may not be made to overlap. without departure from the spirit of my invention. It will be obvious that the points of contact of the bolster bearings with the cam surfaces of the rockers. may be located so as to produce any de sired resistance, and thereby a relatively low initial resistance may be exerted. This result could only be obtained, with the ordinary form of rockers, by increasing the height of the rocker or decreasing the distance between the rocker journals, or both. Inasmuch as each rocker operates in one direction, the rockers may be located in close proximity to the swing frame, when in normal central position, which is of distinct advantage in obviating the necessity of providing additional clearance.

In consequence of the operative swing of the rockers being in one direction only, the

journals thereof do not lift from their bearings in the swing frame, and by remaining continuously in contact with them, the access of einders, etc and consequent obstruction and wear of the parts prevented. It is necessary to finish the journals of rockers of the ordinary form by milling. while those of rockers in. accordance with my invention may be finished by the more economical method of turnii'ig in a lathe. The curved cam surfaces of the rockers may be sin'iilarly finished. In order to further protect the rocker journals from the access of foreign matter, they may, if desired. be covered by caps.

The structural modification shown in Figs. 6 to S) inclusive, accords, operatively. with the construction hert-iinbefore described. and dill'ers. structurally, therefrom, in the provision of means for attaining the advantages of a three point hearing. In the construction illustrated in Figs. 1 to 5 inelusive, the bolster. when in middle position, rests on eight hearing points. and when dis placed laterally. on. four points. In the structural modification of the su -eeeding figures. three pairs of double inclined bearin '7, 7. are applied. the hearings in each of two outer pairs. 7 lying in the same vertical transverse planes, and the bearings of the inner pair 7, in the transverse, plane intermediate those of the outer ones. The rocker members, 9, of the outer hearings are similar to those shown in Fig. -l. and the rocker n'iei'nbers, 9 on which the inner or middle bearin s rest, present only single cam surfaces to the bearings. The contact points of the outside hearings. on the rocker memhers. ii are closer to the centre than those of the inner hearings on the rockers, 9', the relative distances being approximately in the ratio of two to one, thus giving approximately equal. distribution of the load on each of the three bearing lines, when the bolster is in its middle position.

Inasmuch as the inner bearings, T. obstruct the opening provided for the centre pin, in the bolster, a different form of centre pin is required in the structural modifica tion last described, than would be applicable with the construction of Figs. 1 to 5 inclusive, but this detail does not form part of my invention, an d, therefore, is not herein described.

I claim as my invention and desire to secure by Letters Patent:

1. In a railroad truck, the combination of a main frame; a holster. adapted to traverse laterally, relatively thereto; a plurality of bearings, disposed in pairs, the units of which are oppositely inclined, on opposite sides of the longitudinal central plane of the bolster; a swing frame, fixed to the main frame; and a plurality of swinging rockers, each journaled in the swing frame. and having two curved cam faces, each adapted to work against a unit of a pair of bolster bearings.

2. In a railroad truck, the combination of a main frame; a bolster, adapted to traverse laterally, relatively thereto; a plurality of bearings, disposed in pairs, the units of which are oppositely inclined, on opposite sides of the longitudinal central plane of the bolster; a swing frame, fixed to the main frame; and a plurality of rockers, each journalled in the swing frame and having two curved cam faces, each adapted to work against a unit of a pair of bolster hearings. in one direction only of the movement of the rorker.

3. In a railrod truck, the combination of a main frame; a bolster, adapted to traverse laterally, relatively thereto; a plurality of pairs of bearings. the units of eachv pair being oppositely inclined. on opposite sides of the. longitudinal central plane of the bolster, and being alternated in inclination longitudinally thereof; a swinging frame, fixed to the main frame; and a plurality of swinging rockers, jour. alled in the swing trains. and having curved cam. faces, said rockers being adapted to work against alter nately oppositely inclined units of the several pairs of bolster bearings.

4-,. In a railroad. truck, the combination of a main frame: a bolster adapted to traverse laterally, relatively thereto: a plurality of pairs of. bearings, the units of each pair being oppositely inclined, on opposite sides of the longitudinal central plane of the bolster, and being alternated in inclination longitudinally thereof. a unit of one pair longitudinally overlapping a unit of another pair; a swing frame, fixed to the main frame; and a plurality of swinging rockers, journalled in the swing frame, and having curved cam faces, said rockers being adapted to work against alternately oppositely inclined units of the several pairs of bolster bearings.

In a railroad truck, the combination of a main frame; a bolster, adapted to traverse laterally, relatively thereto; a plurality of bearings, disposed in pairs, the unit-s of which are oppositely inclined on opposite sides of the longitudinal central plane of the bolster; a swing frame, fixed to the main frame; a plurality of swinging rockers, each journalled in the swing frame and having two curved cam surfaces, each adapted to bear against a unit of a pair of bolster hearings, in one direction only of the movement of the rocker; and stops on the swing frame, limiting the traverse of the rockers.

6. In railroad truck, the combination of a main frame; a bolster, adapted to traverse laterally, relatively thereto; a plurality of bearings, disposed in pairs, the units of which are oppositely inclined, on opposite sides of thelongitudina-l central plane of the bolster; a swing frame. fixed to the main frame; and a plurality of swinging rockers,

each journalled, on a single axial line, in the swing frame, and having two curved cam faces, each adapted to work against a unit of a )air of bolster bearings.

A swing rocker for lateral motion railroad trucks, comprising a body; arms projecting therefrom and having curved cam faces on their outer ends; and journals, projecting from the body, in line axially therewith.

8. In a railroad truck, the combination of a frame; a bolster, adapted to traverse laterally, relatively thereto; a plurality of bearings, disposed in three sets of oppositely inclined pairs, the outer pairs lying in the same vertical transverse planes, and the inner pairs in a different transverse vertical plane: a swing frame, fixed to the main frame; and a plurality of swinging rockers, journalled in said frame, each havin a curved cam surface, adapted to abut against one of the bearings, in one direction only of lateral displacement of the bolster from normal middle position.

ROBERT F. HALL.

\Vitnesses C. FABOSKAY, C I\. GETCHELL. 

